package band.wukong.practice.javase.core.regex;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * Allows you to easily try out regular expressions.
 * User: Johnson
 * Date: 2012-8-28 15:02:19
 * To change this template use File | Settings | File Templates.
 */
public class TestRegularExpression {

    //{Args: abcabcabcdefabc "abc+" "(abc)+" "(abc){2,}" }
    public static void main(String[] args) {
        if (args.length < 2) {
            System.out.print("Usage:\njava TestRegularExpression "
                    + "characterSequence regularExpression+");
            System.exit(0);
        }
        System.out.println("Input: \"" + args[0] + "\"");
        for (String arg : args) {
            System.out.println("Regular expression: \"" + arg + "\"");
            Pattern p = Pattern.compile(arg);
            Matcher m = p.matcher(args[0]);
            while (m.find()) {
                System.out.println("Match \"" + m.group()
                        + "\" at positions "
                        + m.start() + "-" + (m.end() - 1));
            }
        }
    }
}
/* Output:
Input: "abcabcabcdefabc"
Regular expression: "abcabcabcdefabc"
Match "abcabcabcdefabc" at positions 0-14
Regular expression: "abc+"
Match "abc" at positions 0-2
Match "abc" at positions 3-5
Match "abc" at positions 6-8
Match "abc" at positions 12-14
Regular expression: "(abc)+"
Match "abcabcabc" at positions 0-8
Match "abc" at positions 12-14
Regular expression: "(abc){2,}"
Match "abcabcabc" at positions 0-8
*///:~
